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Accepted
Robin Winslow
Asked: 2014-05-28 00:11:24 +0800 CST

What types are allowed in config.yaml in juju charms?

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The "config.yaml" settings inside juju charms contain a type - e.g.:

pip_no_index:
    default: False
    type: boolean
    description: "Prevent pip connecting to Python Package Index to download packages"

This type defaults to string if not provided. The only ones I've seen in existing charms are:

  • string
  • boolean
  • int

Is it possible to have other types? Specifically, list or dictionary? Is there a list of charm config types anywhere?

configuration

1 Answers

  1. Best Answer

    All available types (as of r2798):

    • string (default)
    • int
    • float
    • boolean

    From the code:

    var optionTypeCheckers = map[string]schema.Checker{
    "string":  schema.String(),
    "int":     schema.Int(),
    "float":   schema.Float(),
    "boolean": schema.Bool(),
}

    If a type: setting is found in config.yaml which doesn't match one of these, then it throws the error:

    option [option_name] has unknown type [type]

    This is a shame. I'd have very much liked the option of a dictionary or map type

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